Which manual calculation skills are still needed when students use graphic/symbolic calculators or computers with computer algebra systems (CAS)? What should students be able to do manually, i.e. just using paper and pencil? This text is the outcome of a two-day discussion on these questions, held by the four authors. Our answers and proposals are meant to be a challenge, aiming at sparking off a broad discussion about which permanently available manual calculation skills we still need to teach and assess. (Author)